CN105441787A - Production method of hot rolled high-carbon steel wire rod for rope manufacturing - Google Patents
Production method of hot rolled high-carbon steel wire rod for rope manufacturing Download PDFInfo
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- CN105441787A CN105441787A CN201510949267.XA CN201510949267A CN105441787A CN 105441787 A CN105441787 A CN 105441787A CN 201510949267 A CN201510949267 A CN 201510949267A CN 105441787 A CN105441787 A CN 105441787A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a production method of a hot rolled high-carbon steel wire rod for rope manufacturing. The production method comprises the procedures of component and performance design, converter smelting, LF furnace refining, continuous casting, casting blank heating, controlled rolling and controlled cooling, and the like. The technical point lies in that (1) the high-carbon steel components and performances are designed; (2) through converter smelting, the phosphorus content is controlled; (3) through LF furnace refining, impurities in steel are removed; (4) the source of aluminum in steel is controlled; (5) during the continuous casting process, large particle impurities are reduced; (6) the central defects of casting blanks are relieved; (7) all-protected casting is adopted during the continuous casting process; (8) a billet steel heating system is set; (9) scales formed on the billet steel surface due to oxidization are removed through high pressure water; and (10) through controlled rolling and controlled cooling, the mocrostructure sorbite rate is increased. According to the production method, the components and performances of 60#-80# steel are optimally designed, the procedures are strictly controlled, the microstructure of the wire rod is improved, the surface quality of the wire rod is improved, and steel wires and steel ropes manufactured through the produced wire rod are good in quality and are widely used for dragging and lifting devices.
Description
[technical field]
The present invention relates to the rolling method of metal, furthermore, relate to the method for rolled wire, in particular to the production of high carbon steel gren rod.
[background technology]
High carbon steel gren rod is the raw material of Steel Wire Products Industry for drawn steel wire, twisting steel cable, needs the drawing through multi-pass, after being drawn into monofilament, then to monofilament carry out high speed twist with the fingers stock make steel cable.Wire rod is in high-stress state all the time in the whole course of processing, any defect all can cause steel wire fracture, user wishes that wire broken rate is more low better, the steel wire made, steel cable have high strength, high-ductility, and performance inconsistency is little, therefore following requirement is had to raw material wire rod quality: 1. steel is clean, without brittle inclusion; 2. in steel, harmful element P, S content is low; 3. composition fluctuation is little; 4. wire rod center is without cementite network; 5. wire rod microtexture sorbitic rate is high and even; 6. wire rod intensity is high, and plasticity is good, any surface finish, and without defects such as the ears or side handles of a utensil, dimensional precision is high.
In Chinese patent database, the application part related to the production of high carbon steel gren rod is relevant is few, as No. CN101327490B " production method of good-quality high-carbon steel green rod for drawing ", No. CN102851579A " a kind of containing Nb micro-alloyed high-carbon steel gren rod and manufacture method ", No. CN102560047B " a kind of hot-rolling method controlling high-carbon steel wire rod embrittlement of grain boundaries ", No. CN103028599B " a kind of production method for hot rolled ribbed steel bar steel wire rod ", No. CN103305675B " a kind of control method of steel cord gren rod surface-carburized layer " etc.Above-mentioned patented technology all can't meet the specification of quality of user to rope making high carbon steel gren rod completely.There is no the patent application that rope making high carbon steel gren rod is produced at present.
[summary of the invention]
The present invention aims to provide a kind of production method of rope making high carbon steel gren rod, makes 60 of φ 5.5 ~ 14mm
#~ 80
#the quality and performance of wire rod meets user's service requirements.
Contriver is for 60 of φ 5.5 ~ 14mm
#, 65
#, 70
#, 75
#with 80
#the production technology of high carbon steel gren rod is tackled key problems, and adopts following operation to produce: top and bottom combined blown converter smelting, slag-stopping tapping, ladle deoxidation alloying, the refining of LF stove, soft blow argon, billet continuous casting, strand heating, high-speed rod-rolling mill rolling, air-cooled line cooling, collection, finishing, bundling, weigh and list, unload and be involved in storehouse; The technical essential of the inventive method is:
(1) composition and functional design
The composition of rope making high-carbon steel wire rod should meet intensity and the plasticity requirements of finished product steel wire, meet requirement that is hot candied, that twist with the fingers not fracture of wire in the stock course of processing again, therefore must design the control objectives value of carbon in high carbon steel, silicon, manganese, phosphorus, sulphur, nitrogen, copper, nickel, each element of chromium and dissolved aluminum Als;
The performance of rope making high-carbon steel wire rod will meet the requirement of tensile strength and relative reduction in area, therefore must design tensile strength and the relative reduction in area of various model high-carbon steel wire rod;
(2) adopt high phosphorus hot metal in converter smelting, by double-slag operation, the two Slag Retaining Process of tapping, make molten steel by massfraction containing P≤0.015%;
(3) LF stove refining: employing calcium carbide, SiFe powder make white slag, employing MnFe adjusts manganese, SiFe adjusts silicon, after molten steel composition and temperature reach requirement, feeds SiCa line and carries out denaturing treatment to steel inclusion; Feed the complete soft blow argon of SiCa line and remove steel inclusion, soft blow argon time controling is at more than 10min, and flow control is at 20 ~ 80L/min;
(4) source of aluminium in steel is controlled: for controlling Al in slag
2o
3als content in steel controls at below 10ppm by content, requires the reductor that use Al content is low or without aluminium deoxidation, also will control the content of aluminium in alloy and other raw materials, reduce the source of aluminium;
(5) casting process must reduce large inclusions: after molten steel connects and waters in process and require that next Baogang's water takes bale panoramic tables, last Baogang water just can stop to water, require that continuous casting changes large bag time controling within 3min, Metal in Tundish liquid level guarantees more than 400mm; Large bag adopts stuffing sand from opening the technology of watering, from casting rate 100%; Large band Ar seals protective casing cast, and tundish adopts submerged nozzle, adopts dam and air curtain barricade wall to change molten steel flow field, inclusion content in melting steel is fully floated, purify hot metal;
(6) alleviate strand central defect: take to control Metal in Tundish superheating temperature, optimize M-EMS, stablize strand casting speed and improve two cool conditions, alleviating strand central defect;
(7) casting process adopts full guard casting: the steel stream from steel teeming ladle to tundish adopts long protective casing to carry, and seals by the method for blowing argon gas; Tundish adopts special insulating covering agent to cover molten steel, and air and molten steel are completely cut off, simultaneously to molten steel insulation; Steel stream from tundish to crystallizer adopts long sleeve pipe to carry, and makes steel stream and air exclusion; Crystallizer adopts mould flux, makes molten steel and air exclusion, lubricates simultaneously to billet surface, improves cc billet surface quality;
(8) formulate heating steel billet system: by stove assembly, furnace temp controls: heating steel billet is even, steel billet head, in, the tail temperature difference≤50 DEG C, prevent steel billet from occurring the phenomenons such as overheated, burning in heat-processed; Require that strand in cold stage heating slowly, and in hot stage heating fast, shorten the residence time in high temperature section as far as possible;
(9) high pressure water is except " squama ": utilize the iron sheet that the mechanical impact force of high pressure water is formed to remove billet surface oxidation:
(10) controlled rolling and controlled cooling: control rolled piece and go out to wear in advance water temp and laying temperature, and control air-cooled, make the microtexture sorbitic rate of wire rod reach more than 80%.
In above-mentioned technical essential (1), the control objectives value of described each element and dissolved aluminum Als is: the control objectives of carbon content is center line ± 0.01% of design mix, silicone content 0.21% ~ 0.25%, Fe content 0.65% ~ 0.68%, phosphorus P≤0.015%, sulphur S≤0.015%, dissolved aluminum Als≤10ppm, nitrogen content N≤80ppm, Cu content is no more than 0.20%, nickel content is no more than 0.15%, and chromium content is no more than 0.10%; Tensile strength and the relative reduction in area of described design are: by 60
#~ 80
#the functional design of wire rod is as follows: tensile strength Rm is 900 ~ 1050MPa, and relative reduction in area is 25%.
In above-mentioned technical essential (3), described soft blow argon time controling is at more than 10min, and flow control is at 20 ~ 80L/min.
In above-mentioned technical essential (4), the reductor that described Al content is low is the reductor that aluminium content is less than 1%.
In above-mentioned technical essential (6), described Metal in Tundish superheating temperature controls at 20 DEG C ~ 30 DEG C; The measure of described optimization M-EMS is 60
#~ 70
#m-EMS frequency be 4Hz, electric current 240A, 75
#~ 80
#m-EMS frequency be 5Hz, electric current 320A; The requirement of described stable strand casting speed is 60
#~ 75
#strand casting speed be stabilized in 1.90 ± 0.02m/min, two cold specific waters are 0.71L/kg, 80
#strand casting speed be stabilized in 1.73 ± 0.02m/min, two cold specific waters are 0.60L/kg.
In above-mentioned technical essential (8), described furnace temp controls as heating zone 1130 DEG C ~ 1180 DEG C, and it is 1100 DEG C ~ 1150 DEG C that soaking zone controls, and it is 980 DEG C ~ 1050 DEG C that inlet of rolling mill steel billet temperature controls, and it is 1015 DEG C that target temperature controls.
In above-mentioned technical essential (10), described rolled piece goes out to wear in advance water temp and controls at 880 DEG C ~ 910 DEG C, and laying temperature controls at 820 DEG C ~ 860 DEG C.
Contriver points out: " control objectives of carbon content is the center line of design mix " is little in order to control the little wire rod strength fluctuation that makes of carbon content change, such as 70
#the center line of steel carbon is 0.70%, then controlling at 0.69% ~ 0.71%, 65# steel carbon center line is 0.65%, then control, 0.64% ~ 0.66%, so to analogize.
The present invention is to 60
#~ 80
#the composition of steel is optimized design, by the process control to converter smelting, the refining of LF stove, continuous casting, reduces the Al in steel
2o
3, the brittle inclusion such as TiN, alleviate the central defect of strand, by controlled rolling and controlled cooling technique, improve the microtexture of wire rod, improve wire rod surface quality, the wire rod produced by the inventive method manufactures steel wire and steel cable for wire rope factory, and steel wire, for the manufacture of spring and steel cable, is widely used in that colliery, ocean, harbour, elevator etc. are dilatory, lift technique.
[embodiment]
Adopt production rope making of the present invention with 60 with applicant company steelworks and Steel Mill
#~ 80
#high carbon steel gren rod is example, further illustrates the present invention.
This factory's production technique comprises following operation: 100 tons of top and bottom combined blown converter smeltings, slag-stopping tapping, ladle deoxidation alloying, the refining of LF stove, soft blow argon, 150 billet continuous castings (pour into a mould by the full guard of molten steel and air exclusion, six machine six stream casters, crystallizer is furnished with induction stirring, secondary cooling zone aerosol cools red base), strand heats, high-speed rod-rolling mill rolling (de-scaling, roughing, crop end, in roll, crop end, pre-finish rolling, wear water in advance, crop end, finish rolling, water is worn after rolling, pinch, weave silk), stellmor air-cooled line cools, collect, finishing, bundling, weigh and list, unload volume, warehouse-in.
Steel-making
1.1100t top and bottom combined blown converter smelting
Material condition: hot metal composition counts Si=0.30% ~ 0.80%, Mn=0.30% ~ 0.80%, P≤0.120%, S≤0.040% with massfraction, Cr≤0.12%, Ni≤0.10%, Cu≤0.15%, molten iron temperature>=1250 DEG C, adopt high-quality steel scrap, lime composition counts CaO > 90%, SiO with massfraction
2≤ 1.5%, S < 0.15%, activity of lime > 310ml.
Loading system: it is 90t that iron and steel stock enters stove total amount, wherein molten iron 80t, steel scrap 10t.
Slagging regime: when molten iron contains P in massfraction > 0.100%, adopt double-slag operation, when molten iron P≤0.100%, adopts single-slag operation.
Terminal point control: adopt high drawing to re-blow, avoid repeatedly after-blow, guarantee molten steel not peroxidation, goes out composition of steel in massfraction containing C >=0.08%, P≤0.012%, S≤0.030%.If terminal C < 0.08%, then change other steel grade of refining.Requirement waits sample tapping, first ensures P≤0.012%.
Tapping steel: ensure tap hole in order, the time of tapping >=3min, adopts the two slag-stopping tapping of floating plug+scum rod, ladle slag layer thickness≤50mm.
Ladle requires: require to use red ladle, ladle temperature >=900 DEG C, bottom blowing brick is unimpeded, and ladle is clean, must not have bag edge, guarantees that large water-coating port is from opening.
Deoxidation alloying: 80
#steel adopts the carburetting of low nitrogen carburelant, and other trade mark steel adopts common carburelant carburetting, adopts ferro-silico-manganese+ferromanganese to join manganese, not enough silicon ferrosilicon polishing.Adopt SiCaBa alloy to carry out final deoxygenation, add-on 60 ~ 120kg/ stove, when terminal oxidisability is strong, suitably increase the add-on of SiCaBa alloy.Alloy addition sequence is ferro-silico-manganese-carburelant-ferrosilicon-SiCaBa alloy.
Converter temperature controls: to ensure that molten steel arrives refining station temperature for target, tapping temperature=1600 ~ 1640 DEG C, to refining station temperature=1500 ~ 1530 DEG C.
Molten steel composition controls: the lower limit that the molten steel composition after converter smelting ladle deoxidation alloying presses finished product composition controls, then by LF refinery practice adjusting component to product summary composition.It is as follows that molten steel enters LF stove refining station composition:
The refining of 1.2LF stove
Refinery practice flow process: molten steel enter the station → thermometric, pre-blowing Ar → enter position → once heating → thermometric, sampling → composition coarse adjustment → heat, make white slag → thermometric, sampling → composition accurate adjustment, refining → thermometric → go out position → feed silk, sampling → soft blow Ar, thermometric → add heat preserving agent → continuous casting.
Refining operation: arrive at a station at temperature accordingly, adopt corresponding gear slag, liquid white slag is formed in power supply 10min, must ensure to form white slag in power supply 15min, and keep the white slag time to be not less than 10min, add synthetic slag, refining slag slag making, and increase synthetic slag consumption according to in-furnace temperature, molten steel sulphur content and change slag situation.Calcium carbide, SiFe powder, aluminum shot (granularity≤3mm) and aluminium vanadine is adopted to make white slag.Refining process regulates ladle bottom blowing argon flow amount, prevents refining from turning over greatly excessive slag, and regulates dedusting fan air quantity to ensure refining furnace micro-pressure operation.
Feed silk and soft blow argon: LF stove refining treatment is complete, hello SiCa line or pure calcium line carry out Calcium treatment, and after feeding silk, soft argon blowing time is greater than 10min, slightly springs up not exposed molten steel face be advisable with the ladle top of the slag.
Refining cycle: the refining cycle of every stove steel (ladle enter LF stove add thermal potential complete to soft blow argon) controls by 38 ~ 45min.
It is as follows that refining terminates molten steel composition:
It is as follows that refining terminates liquid steel temperature:
1.3 continuous casting
Adopt high carbon steel mould flux, full guard is poured into a mould, and stirring parameter sees the following form, and square billet section is 150mm × 150mm, and steel billet length performs by the production program.
Employing stopper is poured into a mould, casting speed 1.90 ± 0.02m/min(80
#steel casting speed 1.73 ± 0.02m/min), two cold specific waters are 60
#~ 75
#steel 0.71L/kg(80
#steel 0.60L/kg), stopper occurs that two loss controls must stop cast.
Metal in Tundish superheating temperature target is as follows by 25 ± 5 DEG C of controls.Continuous casting five flows temperature when casting and controls by the upper limit, and before adopting the tundish of slag blocking wall, 3 Baogang crystals refine out-station temperature and raise 10 ~ 15 DEG C.
Straightening temperature controls: straightening temperature >=900 DEG C, avoids straightening cracks sensitive area.
Connect when watering and ensure full tundish operation, Metal in Tundish liquid level 600 ~ 700mm, be minimumly not less than 400mm.
Continuous casting is often organized steel and is watered by opening, mid-term and stop watering, and gets 3 heat (batch) number coarse micro-grain samples inspections altogether in various flows time.The quality objectives of continuously cast bloom macroscopic examination: center porosity≤1.0 grade, shrinkage cavity≤0.5 grade, non-metallic inclusion≤0.5 grade, centre burst≤1.0 grade, middle crack≤1.0 grade, all assay sums are no more than 3.0 grades.
Strand indicates heat (batch) number, steel grade, and point heat (batch) number is stacked, and concentrates and organizes rolling.Continuous casting is often organized front 3 heats of steel and is materialsed and carry out gasometry, if production process has nitrogen pick-up abnormal conditions to materials in time carry out gasometry, quality objectives: [O]≤30ppm, [N]≤80ppm in steel.
Steel rolling
2.1 Heating temperature
By stove assembly, furnace temp controls: heating zone 1130 ~ 1180 DEG C, soaking zone 1100 ~ 1150 DEG C, 1
#inlet of rolling mill steel billet temperature 980 ~ 1050 DEG C, target 1015 DEG C.
Heating steel billet should be even, steel billet head, in, the tail temperature difference≤50 DEG C, prevent steel billet from occurring the phenomenons such as overheated, burning in heat-processed; Be micro-reducing atmosphere in stove; If stop the time of rolling at more than 30min, then cool to 900 DEG C of insulations immediately.
Roll control
Rolling specs: φ 6.5mm, φ 8mm.For 80
#steel, rolling number≤45 per hour.
High pressure water is except " squama ".
Rolled piece goes out to wear in advance water temp 850 DEG C ~ 910 DEG C; Laying temperature 820 DEG C ~ 860 DEG C, target value 840 DEG C.
Roll rear water box all to open.
Air-cooled control
Air-cooled roller table speed is set as follows:
| Roller-way segment number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | All the other |
| Advanced rate | 0 | 2 | 4 | 4 | 30 | 35 | 45 | 50 | 50 | 55 |
Blower fan, roller-way principal velocity control as follows:
Stay-warm case is all opened.
Other requirement
1), before rolling, the service condition of each frame import and export guide and guard, groove is checked, to not meeting will changing in time of specification of quality.
2) the every root head of wire rod φ 6.5mm specification shears 15 circles, and afterbody shears 5 circles; The every root steel head of φ 8mm specification shears 5 circles, and afterbody shears 4 circles.As defect is not sheared totally, then strengthen shearing dynamics, until cut clean.
3) finished product physical dimension precision controlling: out of roundness≤0.30mm.Finished surface should be smooth, without macroscopic crackle, folding, the ears or side handles of a utensil, scab, layering and the defect such as to be mingled with, allow projection, cut, the pitted skin of impression and local, its degree of depth or height must not be greater than 0.10mm, prevent bull, disorderly volume.
4) forbid when dish circle runs on cold scattering roller-way to stop roller-way running or reduction of speed, otherwise the full portion of dish on roller-way sentences useless.Dish rounded tail portion forbids to raise speed on cold scattering roller-way.
Require the parameter of record
Steel billet enters process furnace time, process furnace each section of parameter, time of coming out of the stove, open rolling (1
#before milling train) temperature, roll speed, hour rolling number, enter finishing mill rolled piece temperature, laying temperature, final dimension (temperature survey is as the criterion with portable temperature-measuring gun).
Inspection content and requirement
1) in beginning rolling, change the trade mark, change specification or stop the time of rolling and in situation, fast dynamics inspection must be carried out to first three lot number product more than 8 hours etc.; Imitate to each lot number power taking, after 8 hours, sample presentation carries out mechanical properties test judgement.
2) 60
#, 65
#steel is at interval of 5 lot numbers, 70
#~ 80
#steel does a metallographic examination, gas examination at interval of 3 lot numbers, and the every root of finished appearance must be examined, and size, Decarburized layer often criticize sampling observation.
3) 60
#~ 80
#wire rod gas content [O] > 30ppm or [N] > 80ppm manages by waste product.
4) wire rod inclusion behavior≤2.0 grade are sentenced qualified, and rank > 2.0 grades manages by waste product.
5) 70
#~ 80
#wire rod microtexture sorbite rate manages by waste product lower than 80%.
The said firm is with present invention achieves large-scale production, and wire rod manufactures steel wire and steel cable for wire rope factory, and steel wire is for the manufacture of spring and steel cable; steel cable is sold to all parts of the country; be widely used in, in every profession and trade equipment, not occurring any quality objection, pulled the development of regional economy.
Claims (7)
1. the rope making production method of high carbon steel gren rod, wire rod system adopts following operation to produce: top and bottom combined blown converter smelting, slag-stopping tapping, ladle deoxidation alloying, the refining of LF stove, soft blow argon, billet continuous casting, strand heating, high-speed rod-rolling mill rolling, air-cooled line cooling, collection, finishing, bundling, weigh and list, unload and be involved in storehouse, it is characterized in that comprising following technical essential:
(1) composition and functional design
For 60 of φ 5.5 ~ 14mm
#, 65
#, 70
#, 75
#with 80
#rope making high-carbon steel wire rod, its composition should meet intensity and the plasticity requirements of finished product steel wire, meet requirement that is hot candied, that twist with the fingers not fracture of wire in the stock course of processing again, therefore must design the control objectives value of carbon in high carbon steel, silicon, manganese, phosphorus, sulphur, nitrogen, copper, nickel, each element of chromium and dissolved aluminum Als;
The performance of rope making high-carbon steel wire rod will meet the requirement of tensile strength and relative reduction in area, therefore must design tensile strength and the relative reduction in area of various model high-carbon steel wire rod;
(2) converter smelting: adopt high phosphorus hot metal, by double-slag operation, the two Slag Retaining Process of tapping, controls molten steel by massfraction containing P≤0.015%;
(3) LF stove refining: employing calcium carbide, SiFe powder make white slag, employing MnFe adjusts manganese, SiFe adjusts silicon, after molten steel composition and temperature reach requirement, feeds SiCa line and carries out denaturing treatment to steel inclusion; Feed the complete soft blow argon of SiCa line and remove steel inclusion, soft blow argon time controling is at more than 10min, and flow control is at 20 ~ 80L/min;
(4) source of aluminium in steel is controlled: for controlling Al in slag
2o
3als content in steel controls at below 10ppm by content, requires the reductor that use Al content is low or without aluminium deoxidation, also will control the content of aluminium in alloy and other raw materials, reduce the source of aluminium;
(5) casting process must reduce large inclusions: after molten steel connects and waters in process and require that next Baogang's water takes bale panoramic tables, last Baogang water just can stop to water, require that continuous casting changes large bag time controling within 3min, Metal in Tundish liquid level guarantees more than 400mm; Large bag adopts stuffing sand from opening the technology of watering, from casting rate 100%; Large band Ar seals protective casing cast, and tundish adopts submerged nozzle, adopts dam and air curtain barricade wall to change molten steel flow field, inclusion content in melting steel is fully floated, purify hot metal;
(6) alleviate strand central defect: take to control Metal in Tundish superheating temperature, optimize M-EMS, stablize strand casting speed and improve two cool conditions, alleviating strand central defect;
(7) casting process adopts full guard casting: the steel stream from steel teeming ladle to tundish adopts long protective casing to carry, and seals by the method for blowing argon gas; Tundish adopts special insulating covering agent to cover molten steel, and air and molten steel are completely cut off, simultaneously to molten steel insulation; Steel stream from tundish to crystallizer adopts long sleeve pipe to carry, and makes steel stream and air exclusion; Crystallizer adopts mould flux, makes molten steel and air exclusion, lubricates simultaneously to billet surface, improves cc billet surface quality;
(8) formulate heating steel billet system: by stove assembly, furnace temp controls: heating steel billet is even, steel billet head, in, the tail temperature difference≤50 DEG C, prevent steel billet from occurring the phenomenons such as overheated, burning in heat-processed; Require that strand in cold stage heating slowly, and in hot stage heating fast, shorten the residence time in high temperature section as far as possible;
(9) high pressure water is except " squama ": utilize the iron sheet that the mechanical impact force of high pressure water is formed to remove billet surface oxidation:
(10) controlled rolling and controlled cooling: control rolled piece and go out to wear in advance water temp and laying temperature, and control air-cooled, make the microtexture sorbitic rate of wire rod reach more than 80%.
2. the method for claim 1, it is characterized in that in (1), the control objectives value of described each element and dissolved aluminum Als is: the control objectives of carbon content is center line ± 0.01% of design mix, silicone content 0.21% ~ 0.25%, Fe content 0.65% ~ 0.68%, phosphorus P≤0.015%, sulphur S≤0.015%, dissolved aluminum Als≤10ppm, nitrogen content N≤80ppm, Cu content is no more than 0.20%, and nickel content is no more than 0.15%, and chromium content is no more than 0.10%; Tensile strength and the relative reduction in area of described design are: by 60
#~ 80
#the functional design of wire rod is as follows: tensile strength Rm is 900 ~ 1050MPa, and relative reduction in area is 25%.
3. the method for claim 1, is characterized in that in (3), and described soft blow argon time controling is at more than 10min, and flow control is at 20 ~ 80L/min.
4. the method for claim 1, is characterized in that in (4), and the reductor that described Al content is low is the reductor that aluminium content is less than 1%.
5. the method for claim 1, is characterized in that in (6), and described Metal in Tundish superheating temperature controls at 20 DEG C ~ 30 DEG C; The measure of described optimization M-EMS is 60
#~ 70
#m-EMS frequency be 4Hz, electric current 240A, 75
#~ 80
#m-EMS frequency be 5Hz, electric current 320A; The requirement of described stable strand casting speed is 60
#~ 75
#strand casting speed be stabilized in 1.90 ± 0.02m/min, two cold specific waters are 0.71L/kg, 80
#strand casting speed be stabilized in 1.73 ± 0.02m/min, two cold specific waters are 0.60L/kg.
6. the method for claim 1, it is characterized in that in (8), described furnace temp controls as heating zone 1130 DEG C ~ 1180 DEG C, and it is 1100 DEG C ~ 1150 DEG C that soaking zone controls, it is 980 DEG C ~ 1050 DEG C that inlet of rolling mill steel billet temperature controls, and it is 1015 DEG C that target temperature controls.
7. the method for claim 1, is characterized in that in (10), and described rolled piece goes out to wear in advance water temp and controls at 880 DEG C ~ 910 DEG C, and laying temperature controls at 820 DEG C ~ 860 DEG C.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106269857A (en) * | 2016-08-26 | 2017-01-04 | 无锡兴澄特种材料有限公司 | The production technology that carbon steel is coiled |
| CN107385341A (en) * | 2017-08-02 | 2017-11-24 | 首钢水城钢铁（集团）有限责任公司 | A kind of welding rod steel and its manufacturing process |
| CN111088453A (en) * | 2020-01-08 | 2020-05-01 | 柳州钢铁股份有限公司 | Control method for acid-soluble aluminum in SWRH82B steel |
| CN112620385A (en) * | 2020-11-25 | 2021-04-09 | 江苏省沙钢钢铁研究院有限公司 | Steel cord with grade more than 90, cord steel and production method thereof |
| CN113275530A (en) * | 2021-04-23 | 2021-08-20 | 包头钢铁（集团）有限责任公司 | Production method for reducing warping, rooting and scabbing of high-carbon hard wire rod |
| CN114875300A (en) * | 2022-04-26 | 2022-08-09 | 湖南华菱湘潭钢铁有限公司 | Production method of hot-rolled round steel for expansion-fracture connecting rod |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06271937A (en) * | 1993-03-17 | 1994-09-27 | Kobe Steel Ltd | Production of high strength and high toughness hyper-eutectoid steel wire |
| JP2001259704A (en) * | 2000-03-16 | 2001-09-25 | Nippon Steel Corp | Method for preventing blister defect on hot-rolled steel bar and wire rod |
| CN1778484A (en) * | 2004-11-17 | 2006-05-31 | 首钢总公司 | Continuous-casting and rolling manufacture for 82B wire rod steel strand |
| CN101597713A (en) * | 2009-07-03 | 2009-12-09 | 首钢总公司 | A kind of microalloying SWRH87B gren rod and manufacture method thereof |
| CN102634730A (en) * | 2012-04-28 | 2012-08-15 | 宝山钢铁股份有限公司 | Steel wire rod for 1860MPa-level bridge cable galvanized steel wire and manufacturing method thereof |
| CN103667581A (en) * | 2013-11-22 | 2014-03-26 | 首钢水城钢铁（集团）有限责任公司 | Low-nitrogen SWR82B steel smelting method |
-
2015
- 2015-12-18 CN CN201510949267.XA patent/CN105441787B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06271937A (en) * | 1993-03-17 | 1994-09-27 | Kobe Steel Ltd | Production of high strength and high toughness hyper-eutectoid steel wire |
| JP2001259704A (en) * | 2000-03-16 | 2001-09-25 | Nippon Steel Corp | Method for preventing blister defect on hot-rolled steel bar and wire rod |
| CN1778484A (en) * | 2004-11-17 | 2006-05-31 | 首钢总公司 | Continuous-casting and rolling manufacture for 82B wire rod steel strand |
| CN101597713A (en) * | 2009-07-03 | 2009-12-09 | 首钢总公司 | A kind of microalloying SWRH87B gren rod and manufacture method thereof |
| CN102634730A (en) * | 2012-04-28 | 2012-08-15 | 宝山钢铁股份有限公司 | Steel wire rod for 1860MPa-level bridge cable galvanized steel wire and manufacturing method thereof |
| CN103667581A (en) * | 2013-11-22 | 2014-03-26 | 首钢水城钢铁（集团）有限责任公司 | Low-nitrogen SWR82B steel smelting method |
Non-Patent Citations (3)
| Title |
|---|
| 刘吉远等: "《铁路货车轮轴技术概论》", 30 November 2009 * |
| 刘玠: "《连铸及炉外精炼自动化技术》", 31 August 2006 * |
| 高长益等: "30Si热轧盘条的试制", 《金属制品》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106269857A (en) * | 2016-08-26 | 2017-01-04 | 无锡兴澄特种材料有限公司 | The production technology that carbon steel is coiled |
| CN106269857B (en) * | 2016-08-26 | 2019-03-05 | 无锡兴澄特种材料有限公司 | The production technology that carbon steel is coiled |
| CN107385341A (en) * | 2017-08-02 | 2017-11-24 | 首钢水城钢铁（集团）有限责任公司 | A kind of welding rod steel and its manufacturing process |
| CN111088453A (en) * | 2020-01-08 | 2020-05-01 | 柳州钢铁股份有限公司 | Control method for acid-soluble aluminum in SWRH82B steel |
| CN111088453B (en) * | 2020-01-08 | 2021-05-14 | 柳州钢铁股份有限公司 | Control method for acid-soluble aluminum in SWRH82B steel |
| CN112620385A (en) * | 2020-11-25 | 2021-04-09 | 江苏省沙钢钢铁研究院有限公司 | Steel cord with grade more than 90, cord steel and production method thereof |
| CN112620385B (en) * | 2020-11-25 | 2022-07-22 | 江苏省沙钢钢铁研究院有限公司 | Steel cord with grade of more than 90, cord steel and production method thereof |
| CN113275530A (en) * | 2021-04-23 | 2021-08-20 | 包头钢铁（集团）有限责任公司 | Production method for reducing warping, rooting and scabbing of high-carbon hard wire rod |
| CN114875300A (en) * | 2022-04-26 | 2022-08-09 | 湖南华菱湘潭钢铁有限公司 | Production method of hot-rolled round steel for expansion-fracture connecting rod |
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